# Tagging an EC2 instance with CloudFormation for Accelerate
<a name="acc-tag-cf-ex-tag-ec2"></a>

The following is an example of how you can apply the tag **ams:rt:ams-managed** with the value **true** to an Amazon EC2 instance managed by CloudFormation. The **ams:rt:ams-managed** tag opts you in to having your resources monitored by AMS Accelerate.

```
 Type: AWS::EC2::Instance

Properties: 
  InstanceType: "t3.micro"
  
  # ...other properties...
  
  Tags: 
    - Key: "ams:rt:ams-managed"
      Value: "true"
```